Metal-polish.



UNITED STATES PATENT OFFICE.

WILLIAM H. ALLEN, OF DETROIT, MICHIGAN.

METAL-POLISH.

No Drawing.

To all whom it may concern:

Be it known that I, WILLIAM. H. ALLEN, a citizen of the United States,and residing at Detroit, in the county of Wayne and State of Michigan,have invented a new and Improved Metal-Polish, of which the following isa specification.

This invention relates to compositions for coating the surface ofarticles of iron or steel with carbon, preferably in the form oflamp-black or graphite, and its object is to .-'used. The proportions ofgraphite and Specification of Letters Patent.

Patented Oct. 8, 1918.

Application filed December 7, 1917. Serial No. 205,945.

' lamp-black may be varied if-desired. This paste is applied to thesurface of iron or steel, and when dry is rubbed or brushed. Thephosphoric acid or the acid salts of phosphoric acid attack the iron orsteel, forming phosphates of iron which adhere to the iron, andparticles of the carbon intermingled with the phosphates are united tothe metal by these phosphates. When dry, the surface maybe rubbed withparafiin oil to brighten the finish.

I claim 1. A metal polish consisting of finely divided graphite and lampblack and sufficient dilute phosphoric acid 'to form a thin'paste.

2. A metal polish consisting of sixteen parts by weight of graphite,three parts by weight of lamp-black and sufficient dilute phosphoricacid to form a thin paste.

3. A metal polish consisting of finely divided graphite and lamp-blackand suflicient dilute acid compound of phosphorus to form a thin paste.

WILLIAM H. ALLEN.

